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View Code? Open in Web Editor NEW✔️JavaScript类型检查,弥补typeof不足
License: MIT License
✔️JavaScript类型检查,弥补typeof不足
License: MIT License
typeof
对于基本类型的对象值判断存在以下缺陷
typeof new String('') === 'object'
期望返回为string
typeof
存在以下缺陷
typeof null === 'object'
期望返回值为null
typeof
对于某个类的实例化判断有缺陷
function A () {}
typeof (new A) === 'object'
期望值为A
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